74505021 has 8 divisors (see below), whose sum is σ = 100364544. Its totient is φ = 49157760.

The previous prime is 74505019. The next prime is 74505029. The reversal of 74505021 is 12050547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74505021 - 2¹ = 74505019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74504982 and 74505000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74505029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127725 + ... + 128306.

It is an arithmetic number, because the mean of its divisors is an integer number (12545568).

Almost surely, 2^74505021 is an apocalyptic number.

It is an amenable number.

74505021 is a deficient number, since it is larger than the sum of its proper divisors (25859523).

74505021 is a wasteful number, since it uses less digits than its factorization.

74505021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256131.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 74505021 is about 8631.6291046360. The cubic root of 74505021 is about 420.7865476292.

Adding to 74505021 its reverse (12050547), we get a palindrome (86555568).

The spelling of 74505021 in words is "seventy-four million, five hundred five thousand, twenty-one".